grapewood is hard to sink you may need to anchor it. it also has to cure in your tank and will probably get white mold. it won't hurt anything ,buy will be unsightly.you can scrub it off under hot water.if you attach plants to it you may just let it run its course.it will eventually go away. some people have said it will rot. others have it for years no problem.

Thanks! I'm so glad there are so many knowledgeable people of so many different things on this site!
It's cheap enough that if it rots then I'll just get a new one, but hopefully it won't be a problem.

Thanks! I'm so glad there are so many knowledgeable people of so many different things on this site!
It's cheap enough that if it rots then I'll just get a new one, but hopefully it won't be a problem.

i assume that you could coat it in polyurethane. should be safe after it cures. but i'd still research it. if it is safe it would be pretty cool.